diff options
Diffstat (limited to 'drivers/vme/boards/vme_vmivme7805.c')
| -rw-r--r-- | drivers/vme/boards/vme_vmivme7805.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/vme/boards/vme_vmivme7805.c b/drivers/vme/boards/vme_vmivme7805.c new file mode 100644 index 00000000000..8e05bb4e135 --- /dev/null +++ b/drivers/vme/boards/vme_vmivme7805.c @@ -0,0 +1,123 @@ +/* + * Support for the VMIVME-7805 board access to the Universe II bridge. + * + * Author: Arthur Benilov <arthur.benilov@iba-group.com> + * Copyright 2010 Ion Beam Application, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/poll.h> +#include <linux/io.h> + +#include "vme_vmivme7805.h" + +static int __init vmic_init(void); +static int vmic_probe(struct pci_dev *, const struct pci_device_id *); +static void vmic_remove(struct pci_dev *); +static void __exit vmic_exit(void); + +/** Base address to access FPGA register */ +static void *vmic_base; + +static const char driver_name[] = "vmivme_7805"; + +static DEFINE_PCI_DEVICE_TABLE(vmic_ids) = { + { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) }, + { }, +}; + +static struct pci_driver vmic_driver = { + .name = driver_name, + .id_table = vmic_ids, + .probe = vmic_probe, + .remove = vmic_remove, +}; + +static int __init vmic_init(void) +{ + return pci_register_driver(&vmic_driver); +} + +static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int retval; + u32 data; + + /* Enable the device */ + retval = pci_enable_device(pdev); + if (retval) { + dev_err(&pdev->dev, "Unable to enable device\n"); + goto err; + } + + /* Map Registers */ + retval = pci_request_regions(pdev, driver_name); + if (retval) { + dev_err(&pdev->dev, "Unable to reserve resources\n"); + goto err_resource; + } + + /* Map registers in BAR 0 */ + vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16); + if (!vmic_base) { + dev_err(&pdev->dev, "Unable to remap CRG region\n"); + retval = -EIO; + goto err_remap; + } + + /* Clear the FPGA VME IF contents */ + iowrite32(0, vmic_base + VME_CONTROL); + + /* Clear any initial BERR */ + data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF; + data |= BM_VME_CONTROL_BERRST; + iowrite32(data, vmic_base + VME_CONTROL); + + /* Enable the vme interface and byte swapping */ + data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF; + data = data | BM_VME_CONTROL_MASTER_ENDIAN | + BM_VME_CONTROL_SLAVE_ENDIAN | + BM_VME_CONTROL_ABLE | + BM_VME_CONTROL_BERRI | + BM_VME_CONTROL_BPENA | + BM_VME_CONTROL_VBENA; + iowrite32(data, vmic_base + VME_CONTROL); + + return 0; + +err_remap: + pci_release_regions(pdev); +err_resource: + pci_disable_device(pdev); +err: + return retval; +} + +static void vmic_remove(struct pci_dev *pdev) +{ + iounmap(vmic_base); + pci_release_regions(pdev); + pci_disable_device(pdev); + +} + +static void __exit vmic_exit(void) +{ + pci_unregister_driver(&vmic_driver); +} + +MODULE_DESCRIPTION("VMIVME-7805 board support driver"); +MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>"); +MODULE_LICENSE("GPL"); + +module_init(vmic_init); +module_exit(vmic_exit); + |